Door Access Control System

ABSTRACT

A door access control system ( 9 ) includes a door lock ( 10 ) mounted to a door ( 435 ). A door lock controller ( 611 ) is mounted in the door ( 435 ) and is electrically connected to the door lock ( 10 ). A wireless charging device ( 511 ) is electrically connected to the door lock controller ( 611 ). A main control unit ( 659 ) is provided for operating the door lock controller ( 611 ). At least one passive door opening unit ( 673 ) is provided to conduct induction with the door lock controller ( 611 ) to unlock the door lock ( 10 ).

BACKGROUND OF THE INVENTION

The present invention relates to a door access control system and, moreparticularly, to a door access control system that can be electricallylocked by actuating an electric driving device of a door lock throughwireless control and that can wirelessly charge a battery of theelectric driving device while the door is closed.

A type of door locks includes a latch device having a latch head mountedin a door and includes inner and outer operating devices mounted toinner and outer sides of the door for driving the latch from a latchingposition to an unlatching position. A lock core is mounted to the outerside of the door and can be used to lock the latch device to preventmovement of the latch head from the latching position to the unlatchingposition by operating the outer operating device (namely, a user canonly use a key to operate the lock core for unlatching purposes) whilepermitting unlatching operation of the latch head by the inner operatingdevice. Thus, unauthorized access to the door can be avoided by manualoperation.

Due to development of technologies, prevention of unauthorized access tothe door can cooperate with an electric burglarproof system or anelectric control system. Specifically, the door can be operated by theelectric burglarproof system or the electric control system, and thestatus of the door can be fed back to the electric burglarproof systemor the electric control system. Conventional mechanical door lockscannot lock the door by wire or wireless control. In view of thisdrawback, a door lock with a locking function by using a solenoid switchconnected to the latch device is proposed. In another approach, a motorcapable of rotating in opposite directions is used to drive a mechanismin the door lock to lock or unlock the door lock. Electricity isrequired in door locks using either a solenoid or a motor, and the doorlocks are generally electrically connected to a mains power or include abattery to provide the electricity. If the door lock is connected bywires to the mains power, the wires are apt to wear or damage due torepeated bending, because the door lock is mounted on a movable door.Furthermore, wire connection of the movable door to the mains power istroublesome. On the other hand, the battery can avoid the wireconnection problems but have a limited capacity of electricity storage,requiring frequent replacement of the battery while having difficultiesin knowing the remaining amount of electricity. As a result, if thebattery is out of electricity of which a user is not aware, the usercannot control locking/unlocking of the door lock, leading to safetyrisks or inconvenience.

An administrator of a door access control system generally holds a keytag for setting the door access authorization. Thus, each of a pluralityof users using the door requires the administrator to firstly proceedwith setting (adding into or deleting from the access list) by the keytag, and then an inductive card is placed close to the key tag to obtainthe door access authorization. However, safety risks occur in the dooraccess management system if the administrator holding the key tag cannottimely add a user to the access list or delete a user from the accesslist due to unavoidable reasons.

Thus, a need exists for a novel door access control system to mitigateand/or obviate the above disadvantages.

BRIEF SUMMARY OF THE INVENTION

A door access control system according to the present invention includesa passive door opening unit having a first memory storing an accessidentification number. A main control unit includes a second memorystoring a management identification number. A door lock includes a latchhead slideable between a latching position and an unlatching position.The door lock further includes a locking mechanism operably connected tothe latch head. The door lock is adapted to be mounted to a door. Acontrol module is connected to the locking mechanism and controls thelocking mechanism to be in a locking state permitting movement of thelatch head from the latching position to the unlatching position or anunlocking state not permitting movement of the latch head from thelatching position to the latching position. A power supply unit iselectrically connected to the control module. A main memory iselectrically connected to the control module. The main memory includesan access list consisting of at least one authorized managementidentification number and at least one authorized access identificationnumber. An active induction module is electrically connected to thecontrol module. The control module is configured for driving the activeinduction module to read the access identification number of the passivedoor opening unit and the management identification number of the maincontrol unit. An infrared activation module is electrically connected tothe control module. An authorization button is electrically connected tothe control module. The authorization button is configured forperforming authorization of door access authority. An authorizationcancellation button is electrically connected to the control module. Theauthorization cancellation button is configured for performingcancellation of door access authority.

When the main control unit or the passive door opening unit is within adetection range of the infrared activation module, the control modulepermits the power supply unit to provide electricity to the activeinduction module for operation.

When the main control unit or the passive door opening unit is within adetection range of the infrared activation module, the control moduledoes not permit the power supply unit to provide electricity to theactive induction module.

When the active induction module operates and when the main control unitis within the communication range of active induction module, the activeinduction module is permitted to read the management identificationnumber of the main control unit.

When the active induction module operates and when the main control unitis outside of the communication range of active induction module, theactive induction module is prevented from reading the managementidentification number of the main control unit.

If the control module identifies that the management identificationnumber of the main control unit is identical to the at least oneauthorized management identification number of the main memory,operations of the authorization button and the authorizationcancellation button respectively for the authorization of door accessauthority and cancellation of door access authority are permitted.

If the control module identifies that the management identificationnumber of the main control unit is not identical to any of the at leastone authorized management identification number of the main memory,operations of the authorization button and the authorizationcancellation button respectively for authorization of door accessauthority and cancellation of door access authority are prevented.

If the authorization button is operated and if the passive door openingunit is placed within the communication range of the active inductionmodule, the control module obtains the access identification number ofthe passive door opening unit through the active induction module andstores the access identification number of the passive door opening unitin the main memory, and the control module adds the accessidentification number of the passive door opening unit into the accesslist of the main memory and sets the access identification number of thepassive door opening unit as an authorized access identification numberto grant door access authority to the passive door opening unit.

If the authorization cancellation button is operated and if the passivedoor opening unit is placed within the communication range of the activeinduction module, the control module obtains the access identificationnumber of the passive door opening unit through the active inductionmodule and compares the access identification number of the passive dooropening unit with the access list of the main memory, and the controlmodule deletes the access identification number of the passive dooropening unit from the access list of the main memory or cancels the dooraccess authority of the access identification number of the passive dooropening unit to cancel the door access authority of the passive dooropening unit.

When the active induction module operates and when the passive dooropening unit is within the communication range of the active inductionmodule, the active induction module is permitted to read the accessidentification number of the passive door opening unit.

When the active induction module operates and when the passive dooropening unit is outside of the communication range of the activeinduction module, the active induction module is prevented from readingthe access identification number of the passive door opening unit.

When none of the authorization button and the authorization cancellationbutton are operated, the control module controls the locking mechanismto be in the unlocking state if the access identification number of thepassive door opening unit is read by the active induction module and isidentified to be identical to the at least one authorized accessidentification number in the main memory.

When none of the authorization button and the authorization cancellationbutton are operated, the control module controls the locking mechanismto be in the locking state if the access identification number of thepassive door opening unit is read by the active induction module and isidentified to be not identical to any one of the at least one authorizedaccess identification number in the main memory.

The door access control system can further include a receiver and atransmitter. The receiver is electrically connected to the power supplyunit. The receiver includes a charging circuit and an antennaelectrically connected to the charging circuit. The receiver is adaptedto be mounted to the door. The transmitter includes a wirelesstransmitting circuit and an antenna electrically connected to thewireless transmitting circuit. The transmitter is adapted to be mountedto a door frame to which the door is pivotably mounted. The transmitteris adapted to be connected to a power supply. When the door is in theopen position, the receiver is not aligned with the transmitter. Whenthe door is in the closed position, the receiver is aligned with thetransmitter, the receiver receives radio wave from the transmitter,converts the radio wave into electricity, and stores the electricity inthe power supply unit.

The main control unit can include a radio frequency identificationcommunication controllable device having the second memory. The radiofrequency identification communication controllable device is configuredfor installing a door access control program for performing a useradding function, a user deletion function, and a synchronizationfunction. The door access control program is configured for generatingthe management identification number and stores the managementidentification number in the second memory of the radio frequencyidentification communication controllable device. The passive dooropening unit includes a radio frequency identification communicationdevice including the first memory. The radio frequency identificationcommunication device is configured for installing a door openingprogram. The door opening program is configured for generating theaccess identification number and stores the access identification numberin the first memory of the radio frequency identification communicationdevice.

When the radio frequency identification communication device executesthe door opening program, the control module is permitted to read theaccess identification number of the RFID communication device throughthe active induction module if the radio frequency identificationcommunication device is placed within the communication range of theactive induction module.

When the radio frequency identification communication device does notexecute the door opening program, the control module is prevented fromreading the access identification number of the RFID communicationdevice through the active induction module even if the radio frequencyidentification communication device is placed within the communicationrange of the active induction module.

When radio frequency identification communication controllable deviceexecutes the door access control program, the control module ispermitted to read the management identification number of the radiofrequency identification communication controllable device through theactive induction module even if the radio frequency identificationcommunication controllable device is placed within the communicationrange of the active induction module.

When radio frequency identification communication controllable devicedoes not execute the door access control program, the control module isprevented from reading the management identification number of the radiofrequency identification communication controllable device through theactive induction module if the radio frequency identificationcommunication controllable device is placed within the communicationrange of the active induction module.

When the radio frequency identification communication controllabledevice and the radio frequency identification communication devicerespectively execute the door access control program and the dooropening program, the radio frequency identification communicationcontrollable device is permitted to read the access identificationnumber of the radio frequency identification communication controllabledevice if the radio frequency identification communication device isplaced within the communication range of the radio frequencyidentification communication controllable device.

When the radio frequency identification communication device is locatedoutside of the communication range of the radio frequency identificationcommunication controllable device or when the radio frequencyidentification communication device does not execute the door openingprogram or when the radio frequency identification communicationcontrollable device does not execute the door access control program,the radio frequency identification communication controllable device isprevented from reading the access identification number of the radiofrequency identification communication device.

When the radio frequency identification communication controllabledevice executes the user adding function, if the radio frequencyidentification communication device is within the communication range ofthe radio frequency identification communication controllable device,the radio frequency identification communication controllable deviceadds the access identification number of the radio frequencyidentification communication device into an access list of the radiofrequency identification communication controllable device and sets theaccess identification number of the radio frequency identificationcommunication device as an authorized access identification number togrant the door access authority to the radio frequency identificationcommunication device.

When the radio frequency identification communication controllabledevice executes the user cancellation function, the radio frequencyidentification communication controllable device selects and deletes oneof the access identification numbers from the access list of the radiofrequency identification communication controllable device or cancelsthe door access authority of the selected access identification number.

When the radio frequency identification communication controllabledevice executes the synchronization function, the radio frequencyidentification communication controllable device is placed within thecommunication range of the active induction module, the control moduleis permitted to obtain the management identification number of the radiofrequency identification communication controllable device through theactive induction module.

If the control module identifies the management identification number ofthe radio frequency identification communication controllable device isidentical to one of the at least one authorized managementidentification number of the main memory, the access list of the mainmemory is synchronized to be identical as the access list of the radiofrequency identification communication controllable device.

If the control module identifies the management identification number ofthe radio frequency identification communication controllable device isnot identical to any one of the at least one authorized managementidentification number of the main memory, synchronization of the accesslist of the main memory to be identical as the access list of the radiofrequency identification communication controllable device is prevented.

Execution of the door access control program can include obtaining aninternational mobile equipment identity of the RFID communicationcontrollable device, setting the international mobile equipment identityof the RFID communication controllable device as the managementidentification number, and storing the management identification numberin the second memory of the radio frequency identification communicationcontrollable device. Execution of the door opening program can includeobtaining an international mobile equipment identity of the RFIDcommunication device, setting the international mobile equipmentidentity of the RFID communication device as the access identificationnumber, and storing the international mobile equipment identity of theRFID communication device in the first memory of the radio frequencyidentification communication device.

The passive door opening unit can further include an inductive cardhaving a pre-set access identification number. When the authorizationbutton is operated and when the inductive card is within thecommunication range of the active induction module, the main controlunit grants door access authority to the inductive card.

The door access control system can further include an inertia detectionunit electrically connected to the control module and an alarm deviceelectrically connected to the control module. When the door accesscontrol system is stricken by an external force, the inertia detectionunit outputs a signal to the control module, and the control moduleactivates the alarm device to send out an alarm message.

The main control unit can include a key tag carrying a passive radiofrequency identification tag having the second memory. The managementidentification number is stored in the second memory of the passiveradio frequency identification tag.

The door lock can further include a case adapted to be mounted in thedoor. The case includes a chamber, and the latch head is slideablyreceived in the chamber. An unlatching mechanism is pivotably receivedin the chamber and includes a follower portion operatively connected tothe latch head. The follower portion is pivotable between a releaseposition and a pressing position. The locking mechanism is mounted inthe chamber and electrically connected to the power supply unit. Thelocking mechanism includes a locking block movable between a frontposition and a rear position. The power supply unit provides electricityrequired for moving the locking block between the front position and therear position.

When the latch head is in latching position, if the unlatching mechanismpivots from the release position towards the pressing position, thelatch head moves from the latching position towards the unlatchingposition.

When the unlatching mechanism is in the pressing position, the latchhead is in the unlatching position.

When the locking block is in the front position, pivotal movement of theunlatching mechanism from the release position to the pressing positionis prevented.

When the locking block is in the rear position, pivotal movement of theunlatching mechanism from the release position to the pressing positionis permitted.

The door lock can further include a base fixed in the chamber. The baseincludes a track and a groove in communication with the track. Thelocking block is slideably received in the track of the base andincludes a receiving groove. The locking block is limited by the trackand is movable in the transverse direction between the front positionadjacent to the unlatching mechanism and the rear position distant tothe unlatching mechanism. A shaft is mounted in the receiving groove ofthe locking block. A first sliding block is slideably mounted on theshaft. The first sliding block is limited by the shaft and is movable inthe transverse direction between a central position in a central portionof the receiving groove and a non-central position not in the centralportion of the receiving groove. A first compression spring is mountedaround the shaft. A second compression spring is mounted around theshaft. The first sliding block is located between the first and secondcompression springs. The first and second compression springs biases thefirst sliding block to the central position. An electric driving deviceis mounted in the groove of the base and is electrically connected tothe power supply unit. The electric driving device includes a drivingshaft having a threaded section at an intermediate portion thereof. Thedriving shaft is controlled to rotate in a forward direction or areverse direction opposite to the forward direction. A second slidingblock includes a screw hole in threading connection with the threadedsection of the driving shaft. A follower plate includes a first portioncoupled to the first sliding block and a second portion coupled to thesecond sliding block.

When the driving shaft rotates in the forward direction, the secondsliding block, the follower plate, and the first sliding block movetowards the unlatching mechanism.

When the driving shaft rotates in the reverse direction, the secondsliding block, the follower plate, and the first sliding block move awayfrom the unlatching mechanism.

When the unlatching mechanism is in the release position, rotation ofthe driving shaft in the forward direction causes movement of thelocking block from the rear position towards the front position.

When the unlatching mechanism is in the pressing position, the lockingblock is blocked by the unlatching mechanism, rotation of the drivingshaft in the forward position causes the first sliding block to movefrom the central position to the non-central position and to compressthe first compression spring, permitting the locking block to beretained in the rear position.

When the locking block is in the rear position, the locking blockdisengages from the unlatching mechanism, permitting the unlatchingmechanism to move from the release position to the pressing position.

When the locking block is in the front position, the locking blockengages with the unlatching mechanism, not permitting the unlatchingmechanism to move from the release position to the pressing position.

When the locking block is in the front position, rotation of the drivingshaft in the reverse direction causes movement of the locking block fromthe front position to the rear position.

The door lock can further include a third compression spring mountedaround the driving shaft and a fourth compression spring mounted aroundthe driving shaft. The second sliding block is located between the thirdand fourth compression springs.

When the locking block moves from the rear position towards the frontposition, the second sliding block compresses the third compressionspring.

When the locking block moves from the front position to the rearposition, the second sliding block compresses the fourth compressionspring.

When the locking block is in the front position, if the driving shaftkeeps rotating in the forward direction, the second sliding block keepscompressing the third compression spring, the screw hole of the secondsliding block disengages from the threaded section of the driving shaft,and the third compression spring biases the screw hole of the secondsliding block to abut an end of the threaded section of the drivingshaft.

When the locking block is in the rear position, if the driving shaftkeeps rotating in the reverse direction, the second sliding block keepscompressing the fourth compression spring, the screw hole of the secondsliding block disengages from the threaded section of the driving shaft,and the fourth compression spring biases the screw hole of the secondsliding block to abut another end of the threaded section of the drivingshaft.

The threaded section of the driving shaft can have a length in thetransverse direction slightly larger than a spacing between the rearposition and the front position of the locking block in the transversedirection.

The base can further include a positioning groove located between thetrack and the groove and intercommunicated with the groove. The drivingshaft can further include an end distant to the threaded section of thedriving shaft. The door lock can further include a pivotal blockdetachably received in the positioning groove of the base. The pivotalblock includes a pivotal hole, and the end of the driving shaft ispivotably received in the pivotal hole of the pivotal block.

The base can further include a first sliding groove extending from thesecond side towards the first side and intercommunicating with thegroove. The cover plate can further include a second sliding groovealigned with the first sliding groove. The second sliding block caninclude a first lug and a second lug. The first lug is slideablyreceived in the first sliding groove of the base, and the second lug isslideably received in the second sliding groove of the cover plate.

The locking block can include a wider portion and a narrower portion.The wider portion includes two outer surfaces spaced from each other ina width direction perpendicular to the transverse direction and an endface extending between the two outer surfaces. The narrower portionincludes two inner faces between the two outer surfaces in the widthdirection. The locking groove is formed in the end face of the widerportion. The locking block further includes a through-hole extendingfrom one of the two inner faces through another of the two inner faces.The wider portion of the locking block is located outside of the trackof the base. The narrower portion is located in the track. The basefurther includes first and second sides spaced from each other in thewidth direction. The unlatching mechanism further includes a firstdriven ring, a second driven ring, and a first follower ring between thefirst and second driven rings. The first and second driven rings arecoupled to and jointly pivotable with the first follower ring. The firstdriven ring includes a first protrusion on an outer periphery thereof.The second driven ring includes a first projection on an outer peripherythereof. The follower portion is formed on the outer periphery of thefirst follower ring. The case further includes a side having a firstpivotal hole pivotably receiving the first driven ring. The case furtherincludes a first screw hole aligned with the wider portion of thelocking block. The door lock can further include a lid mounted to thecase to close the chamber. The lid includes a second pivotal holepivotably receiving the second driven ring. The lid further includes asecond screw hole aligned with the wider portion of the locking block. Acover plate is mounted to the first side of the base. A spacing betweenthe two inner faces of the locking block is smaller than a bottom of thetrack and an inner face of the cover plate. A guiding block is slideablyreceived in the through-hole of the locking block. The guiding blockincludes two ends respectively abutting the bottom of the track and theinner face of the cover plate, permitting the locking block to move inan axial direction of the guiding block parallel to the width directionbetween a first position adjacent to the side of the case and a secondposition adjacent to the lid. The guiding block and the locking blockare jointly movable between the front position and the rear position. Aswitching screw is selectively engaged with the first screw hole of thecase or the second screw hole of the lid.

When the switching screw engages with the first screw hole of the case,the switching screw biases the locking block to the second position, thelocking groove of the locking block is aligned with the first projectionof the second driven ring in the axial direction of the guiding block,and the locking groove of the locking block is spaced from the firstprotrusion of the first driven ring in the axial direction of theguiding block.

When the switching screw engages with the second screw hole of the lid,the switching screw biases the locking block to the first position, thelocking groove of the locking block is aligned with the first protrusionof the first driven ring in the axial direction of the guiding block,and the locking groove of the locking block is spaced from the firstprojection of the second driven ring in the axial direction of theguiding block.

When the locking block is in the first position and moves from the rearposition to the front position, the locking groove of the locking blockengages with the first projection of the second driven ring.

When the locking block is in the second position and moves from the rearposition to the front position, the locking groove of the locking blockengages with the first projection of the first driven ring.

The door lock can further include first and second operating devices.The first operating device includes a first handle operably connected tothe latching mechanism. The first operating device is adapted to bemounted to a first side of the door. The second operating deviceincludes a second handle operably connected to the latching mechanism.The second operating device is adapted to be mounted to a second side ofthe door opposite to the first side of the door.

When the locking mechanism is set to be in the unlocking state, rotationof either of the first and second handles moves the latch head from thelatching position to the unlatching position.

When the locking mechanism is set to be in the locking state, rotationof either of the first and second handles is prevented, preventingmovement of the latch head from the latching position to the unlatchingposition.

The present invention will become clearer in light of the followingdetailed description of illustrative embodiments of this inventiondescribed in connection with the drawings.

DESCRIPTION OF THE DRAWINGS

The illustrative embodiments may best be described by reference to theaccompanying drawings where:

FIG. 1 is an exploded, perspective view of a latch device of a door lockof a door access control system according to the present invention.

FIG. 2 is an exploded, perspective view of a locking mechanism of thedoor access control system of FIG. 1.

FIG. 3 is a partly exploded perspective view of the door access controlsystem and a door to which the door access control system is mounted.

FIG. 3A is a partly exploded perspective view of the door access controlsystem and the door of FIG. 3 with a wireless charging device exploded.

FIG. 3B is a block diagram of the door access control system of FIG. 1.

FIG. 3C is a front elevational view of the door access control systemand the door of FIG. 3A after assembly.

FIG. 4 is a cross sectional view of the door access control system andthe door of FIG. 3 according to a horizontal section plane.

FIG. 5 is a cross sectional view taken along section line 5-5 of FIG. 4.

FIG. 5A is a view similar to FIG. 5 with the door in a closed position.

FIG. 5B is a view similar to FIG. 5A with the door in the closedposition and with a receiver and a transmitter of the wireless chargingdevice aligned with each other.

FIG. 6 is a cross sectional view taken along section line 6-6 of FIG. 4.

FIG. 7 is a cross sectional view taken along section line 7-7 of FIG. 4.

FIG. 8 is a cross sectional view taken along section line 8-8 of FIG. 5with a switching screw coupled with a first screw hole and with alocking block biased to a second position.

FIG. 9 is a view similar to FIG. 5A with a first handle of a firstoperating device of the door lock rotated and with a latch moved from alatching position to an unlatching position.

FIG. 10 is a view similar to FIG. 6 with a second handle of a secondoperating device of the door lock rotated and with the latch moved fromthe latching position to the unlatching position.

FIG. 11 is a view similar to FIG. 7 with the locking block moved from arear position to a front position.

FIG. 12 is a view similar to FIG. 5A with the locking block moved fromthe rear position to the front position.

FIG. 13 is a view similar to FIG. 8 with the switching screw coupledwith a second screw hole and with the locking block biased to a firstposition.

FIG. 14 is a view similar to FIG. 6 with the switching screw coupledwith the second screw hole, with the locking block biased to the secondposition, and with the locking blocked moved to the front position.

FIG. 15 is a view similar to FIG. 7 with the second handle pivoted tomove the latch from the front position to the rear position, with adriving shaft rotated in a forward direction, with the locking blockremained in the rear position, and with a first sliding block moved to anon-central position.

FIG. 16 is a view similar to FIG. 7 with the driving shaft rotated in areverse direction and with the first sliding block moved to thenon-central position.

All figures are drawn for ease of explanation of the basic teachingsonly; the extensions of the figures with respect to number, position,relationship, and dimensions of the parts to form the illustrativeembodiments will be explained or will be within the skill of the artafter the following teachings have been read and understood. Further,the exact dimensions and dimensional proportions to conform to specificforce, weight, strength, and similar requirements will likewise bewithin the skill of the art after the following teachings have been readand understood.

Where used in the various figures of the drawings, the same numeralsdesignate the same or similar parts. Furthermore, when the terms“first”, “second”, “third”, “fourth”, “bottom”, “side”, “end”,“portion”, “section”, “front”, “rear”, “horizontal”, “vertical”,“transverse”, “axial”, “circumferential”, “spacing”, “length”, “width”,and similar terms are used herein, it should be understood that theseterms have reference only to the structure shown in the drawings as itwould appear to a person viewing the drawings and are utilized only tofacilitate describing the illustrative embodiments.

DETAILED DESCRIPTION OF THE INVENTION

A door access control system is shown in the drawings and generallydesignated 9. Door access control system 9 includes a door lock 10mounted to a door 435, a door lock controller 611 mounted in door 435and electrically connected to door lock 10, a wireless charging device511 electrically connected to door lock controller 611, a main controlunit 659 for controlling door lock controller 611, and at least onepassive door opening unit 673 for unlocking door lock 10 throughinduction with door lock controller 611. For ease of explanation, dooraccess control system 9 includes only one passive door opening unit 673in the form shown.

According to the form shown, door lock 10 includes a latch device 20 andfirst and second operating devices 455 and 473 for operating latchdevice 20. Latch device 20 includes a case 22 having first and secondsides 24 and 26 spaced from each other in a vertical direction and anend face between first and second sides 24 and 26. A faceplate 42 ismounted to the end face of case 22. Case 22 further includes a side 29extending between first and second sides 24 and 26 and faceplate 42,defining a chamber 28 between first and second sides 24 and 26,faceplate 42, and side 29. Formed on side 29 and located in chamber 28are first, second, and third axles 30, 32, and 34, two first pegs 36,and a second peg 37. Side 29 includes a first pivotal hole 38, a firstscrew hole 39, and a first engagement hole 40. First and second axles 30and 32 are located between first engagement hole 40 and first pivotalhole 38 in the vertical direction. Third axle 34 is located betweenfirst and second axles 30 and 32 in the vertical direction. Firstpivotal hole 38 is located between first axle 30 and first screw hole 39in a transverse direction perpendicular to the vertical direction.Faceplate 42 includes first and second holes 44 and 46 in communicationwith chamber 28.

According to the form shown, a lid 217 is detachably mounted to an openside of case 22 to close chamber 28. Lid 217 includes a second pivotalhole 219 aligned with first pivotal hole 38 of case 22, a second screwhole 233 aligned with first screw hole 39 of case 22, and a secondengagement hole 231 aligned with first engagement hole 40 of case 22.

According to the form shown, latch device 20 further includes a latchhead 54 slideably received in chamber 28 of case 22 and a safety bolt62. A shank 50 is fixed to an end of latch head 54. A first positioningplate 48 is fixed to side 29 of case 22. Shank 50 slideably extendsthrough first positioning plate 48. A first spring 55 is mounted aroundshank 50 and is between latch head 54 and first positioning plate 48. Aconnecting member 52 is mounted to a rear end of first positioning plate48. Latch head 54 is aligned with first hole 44 of faceplate 42. Thus,latch head 54, shank 50, and connecting member 52 are jointly moveablebetween a latching position in which latch head 54 extends beyondfaceplate 42 (FIGS. 5, 6, and 8) and an unlatching position in whichlatch head 54 retracts into case 22 and compresses first spring 55 (FIG.9).

According to the form shown, a stem 58 is fixed to an end of safety bolt62. Stem 58 includes a push face 60 on an intermediate portion thereof.Push face 60 is slant in the form shown. A second positioning plate 56is fixed to side 29 of case 22. Stem 58 slideably extends through secondpositioning plate 56. A second spring 65 is mounted around stem 58 andis located between safety bolt 62 and second positioning plate 56.Safety bolt 62 is aligned with second hole 46 of faceplate 42. Push face60 of stem 58 is located behind latch head 54 in the transversedirection. Thus, when latch head 54 is in the latching position, safetybolt 62 is biased by second spring 65 and is retained in a positionextending beyond faceplate 42 (FIGS. 5, 6, and 8). When latch head 54moves from the latching position to the unlatching position, latch head54 presses against push face 60 to move safety bolt 62 in the transversedirection to a retracted position.

According to the form shown, latch device 20 further includes areturning member 63 pivotably mounted to first axle 30 of case 22.Returning member 63 includes a pivotal portion 64 on a side of returningmember 63, a connecting end 66, and a stop portion 68. Pivotal portion64 is tubular in the form shown. Connecting end 66 and stop portion 68are spaced from each other in a circumferential direction about a firstpivot axis defined by first axle 30. A recess 70 is formed in an outerperiphery of returning member 63 and is located between connecting end66 and stop portion 68 in the circumferential direction about the firstpivot axis defined by first axle 30. Pivotal portion 64 of returningmember 63 is pivotably connected to first axle 30. Thus, returningmember 63 can pivot about the first pivot axis.

According to the form shown, a first torsion spring 72 is mounted aroundpivotal portion 64 of returning member 63. First torsion spring 72includes a first tang 74 and a second tang 76 abutting stop portion 68of returning member 63.

According to the form shown, latch device 20 further includes apositioning board 78 and an axle sleeve 85 received in chamber 28 ofcase 22. Positioning board 78 includes first and second fixing holes 80and 82 spaced from each other. Positioning board 78 further includes anengagement portion 84 between first and second fixing holes 80 and 82.First fixing hole 80 receives pivotal portion 64 of returning member 63.Axle sleeve 85 is received in second fixing hole 82 and is mountedaround second peg 37 of case 22. Thus, positioning board 78 can notrotate. First torsion spring 72 is located between returning member 63and positioning board 78. First tang 74 of first torsion spring 72engages with engagement portion 84 of positioning board 78. Thus,returning member 63 is biased by first torsion spring 72.

According to the form shown, latch device 20 further includes anunlatching mechanism 86 pivotably mounted between case 22 and lid 217.Unlatching mechanism 86 includes first and second driven rings 88 and135 having identical shape in the form shown. Unlatching mechanism 86further includes first and second follower rings 98 and 119, a spacerplate 113, and a spacer ring 115, all of which are mounted between firstand second driven rings 88 and 135. First driven ring 88 includes firstand second protrusions 90 and 92 on an outer periphery thereof. Firstdriven ring 88 further includes two bosses 94 on two sides thereof.Second driven ring 135 includes first and second projections 137 and 139on an outer periphery thereof. Second driven ring 135 further includestwo bosses 151 on two sides thereof. One of bosses 94 of first drivenring 88 is pivotably mounted in first pivotal hole 38 of case 22. One ofbosses 151 of second driven ring 135 is pivotably received in secondpivotal hole 219 of lid 217. Thus, first and second driven rings 88 and135 are aligned with each other.

A follower portion 99 is formed on an outer periphery of first followerring 98 and includes a first engagement hole 117. The other boss 151 ofsecond driven ring 135 is pivotably received in first follower ring 98.Second follower ring 119 includes a second engagement hole 131 spacedfrom a center of second follower ring 119 in a radial direction. Theother boss 94 of first driven ring 88 is pivotably received in secondfollower ring 119. Follower portion 99 of first follower ring 98 abutsan inner face of connecting member 52. Spacer ring 115 is locatedbetween first and second follower rings 98 and 119. Spacer plate 113 isreceived in spacer ring 115. Thus, first follower ring 98 is pivotableabout a pivot axis defined by first and second pivotal holes 38 and 219between a release position (FIGS. 5 and 6) and a pressing position(FIGS. 9 and 14). When first follower ring 98 of unlatching mechanism 86pivots, follower portion 99 of first follower ring 98 presses againstand moves connecting member 52 in the transverse direction, moving latchhead 54 from the latching position to the unlatching position.

According to the form shown, latch device 20 further includes a bridgingmember 155. Bridging member 155 includes first engagement end 157pivotably received in first engagement hole 117 of first follower ring98 and second engagement hole 131 of second follower ring 119. Bridgingmember 155 further includes a second engagement end 159 pivotablyconnected to the connecting end 66 of returning member 63. When firstdriven ring 88 or second driven ring 135 of unlatching mechanism 86pivots, second protrusion 92 of first driven ring 88 or secondprojection 139 of second driven ring 135 presses against firstengagement end 157 of bridging member 155 to pivot first and secondfollower rings 98 and 119 from the release position to the pressingposition. At the same time, bridging member 155 drives returning member63 to pivot and to twist first torsion spring 72 by second tang 76,thereby creating a returning force. Thus, first torsion spring 72 canbias first follower ring 98 of unlatching mechanism 86 to the releaseposition. When first follower ring 98 is in the release position, stopportion 68 of unlatching mechanism 86 abuts second protrusion 92 offirst driven ring 88 and second projection 139 of second driven ring 135(FIGS. 5 and 6).

According to the form shown, latch device 20 further includes anunlatching member 195 pivotably received in chamber 28 of case 22.Unlatching member 195 includes first and second ends 197 and 199 and apivotal portion 211 between first and second ends 197 and 199. Pivotalportion 21 of unlatching member 195 is pivotably connected to secondaxle 32 of case 22. First end 197 of unlatching member 195 is locatedadjacent to first engagement hole 40 of case 22. Second end 199 ofunlatching member 195 abuts the inner face of connecting member 52.Unlatching member 195 is pivotable about a second pivot axis defined bysecond axle 32. When unlatching member 195 pivots, connecting member 52is pressed to move in the transverse direction by unlatching member 195,which, in turn, moves latch head 54 from the unlatching position to thelatching position.

According to the form shown, latch device 20 further includes a stopmember 171 pivotably received in chamber 28 of case 22. Stop member 171includes a pivotal end 173 and a stop end 175. Stop member 171 furtherincludes a follower arm 177 on stop end 175 and located on a side ofstop member 171. Pivotal end 173 of stop member 171 is pivotablyconnected to third axle 34 of case 22. Thus, stop member 171 ispivotable about a third pivot axis defined by third axle 34. A secondtorsion spring 179 is mounted around third axle 34 and abuts stop member171. Second torsion spring 179 includes a first tang 191 engaged withstop member 171 and a second tang 193 engaged with case 22. Secondtorsion spring 179 biases stop end 175 of stop member 171 towards latchhead 54.

According to the form shown, latch device 20 further includes a lockingmechanism 251 received in chamber 28 of case 22. Locking mechanism 251includes a base 253 having a substantially L-shaped first portion 255and a second portion 257. Base 253 further includes first and secondsides 259 and 271, a groove 273 in first side 259 and in first portion255, and a positioning groove 279 spaced from groove 273. Base 253further includes a track 275 in first side 259 and in second portion257. Track 275 intercommunicates with groove 273. Two positioning holes278 extend from a bottom wall of groove 273 to second side 271. Base 253includes a first sliding groove 277 extending from the bottom wall ofgroove 273 through second side 271 and located adjacent to positioninggroove 279. Positioning holes 278 of base 253 respectively receive firstpegs 36. First portion 255 of base 253 is located below unlatchingmechanism 86 in the vertical direction. Second portion 257 is locatedbetween unlatching mechanism 86 and side 29 of case 22.

A cover plate 431 is mounted to first side 259 of base 253. Cover plate431 includes a second sliding groove 433 aligned with first slidinggroove 277 of base 253.

According to the form shown, locking mechanism 251 includes a lockingblock 291 slideably received in track 275 of base 253. Locking block 291includes a narrower portion 295 and a wider portion 293. Wider portion293 includes two outer surfaces 294 spaced from each other in a widthdirection perpendicular to the transverse direction. Wider portion 293further includes an end face 311 extending between outer surfaces 294and spaced from narrower portion 295. Wider portion 293 further includesa locking groove 313 in end face 311. Narrower portion 295 includes twoinner faces 297 between outer surfaces 294 in the width direction.Locking block 291 further includes a through-hole 299 extending from oneof inner faces 297 through the other inner face 297. A receiving groove315 extends from one of outer surfaces 294 through the other outersurface 294 and extends across wider portion 293 and narrower portion295. Narrower portion 295 of locking block 291 is slideably received intrack 275 of base 253. Wider portion 293 of locking block 291 is locatedoutside of track 275 of base 253. Locking groove 313 faces firstprotrusion 90 and first projection 137 of unlatching mechanism 86.Locking block 291 is limited by track 275 and is movable in thetransverse direction between a front position (FIGS. 11 and 12) and arear position (FIGS. 5-7). Furthermore, a threaded section 357 ofdriving shaft 355 has a length in the transverse direction slightlylarger than a spacing between the rear position and the front positionof locking block 291 in the transverse direction. Locking mechanism 251is in a locking state when locking block 291 is in the front position.Locking mechanism 251 is in an unlocking state when locking block 291 isin the rear position.

According to the form shown, locking mechanism 251 further includes aguiding block 317 received in through-hole 299 of locking block 291. Twoends of guiding block 317 respectively abut a bottom of track 275 ofbase 253 and an inner face of cover plate 431. Thus, the guiding block317 and the locking block 291 are jointly moveable between the rearposition and the front position of locking block 291. Furthermore, sincea spacing between inner faces 297 of narrower portion 295 of lockingblock 291 is smaller than the spacing between the bottom of track 275and the inner face of cover plate 431 (see FIGS. 8 and 12), lockingblock 291 is moveable in an axial direction of guiding block 317parallel to the width direction between a first position adjacent toside 29 of case 22 (FIG. 13) and a second position adjacent to the lid217 (FIG. 8).

According to the form shown, a shaft 337 is mounted in receiving groove315 of locking block 291. A first sliding block 319, a first compressionspring 333, and a second compression spring 335 are slideably mountedaround shaft 337. First sliding block 319 includes an annular groove 331in an outer periphery thereof. First sliding block 319 is locatedbetween first and second compression springs 333 and 335. First slidingblock 319 is biased by first and second compression springs 333 and 335to a central position in a central portion of receiving groove 315 (FIG.7).

According to the form shown, locking mechanism 251 further includes anelectric driving device 339 received in base 253. Electric drivingdevice 339 includes a motor 351, a speed reducing mechanism 353 coupledto motor 351, and a driving shaft 355 coupled to speed reducingmechanism 353. Driving shaft 355 includes an end 358 distant to speedreducing mechanism 353. Threaded section 357 is formed on anintermediate portion of an outer periphery of driving shaft 355. End 358of driving shaft 355 is pivotably received in a pivotal hole 419 of apivotal block 417. Electric driving device 339 is received in groove 273of base 253 and is pivotably connected to pivotal block 417 received inpositioning groove 279 of base 253. Driving shaft 355 is driven by motor351 to rotate slowly via transmission by speed reducing mechanism 353.

According to the form shown, locking mechanism 251 further includes asecond sliding block 359, third and fourth compression springs 393 and395, and a follower plate 397, all of which are received in groove 273of base 253. Second sliding block 359 includes first and second faces371 and 373 and a screw hole 391 extending from first face 371 throughsecond face 373. Second sliding block 359 further includes first andsecond lugs 377 and 379 on two ends thereof and an engagement portion375 on first face 371.

According to the form shown, second sliding block 359 and third andfourth compression springs 393 and 395 are mounted around driving shaft355. Second sliding block 359 is located between third and fourthcompression springs 393 and 395. Third compression spring 393 is locatedbetween second sliding block 359 and speed reducing mechanism 353.Fourth compression spring 395 is located between second sliding block359 and pivotal block 417. First lug 377 is slideably received in firstsliding groove 277 of base 253. Second lug 379 is slideably received insecond sliding groove 433 of cover plate 431. Furthermore, screw hole391 of second sliding block 359 is in threading connection with threadedsection 357 of driving shaft 355. Thus, when driving shaft 355 rotatesin a forward direction, second sliding block 359 is pushed to movetowards unlatching mechanism 86 in the transverse direction andcompresses third compression spring 393. On the other hand, when motor351 drives driving shaft 355 to rotate in a reverse direction, secondsliding block 359 is pushed to move away from unlatching mechanism 86and compresses fourth compression spring 395.

According to the form shown, follower plate 397 includes first andsecond portions 399 and 411. Follower plate 397 further includes aconnecting groove 415 in first portion 399 and a connecting hole 413 insecond portion 411. A peripheral wall of connecting groove 415 of firstportion 399 of follower plate 397 engages with annular groove 331 offirst sliding block 319. Connecting hole 413 of second portion 411engages with engagement portion 375 of second sliding block 359. Thus,first and second sliding blocks 319 and 359 and follower plate 397 arejointly moveable in the transverse direction.

According to the form shown, in order to detect the status of latchdevice 20, a first sensor 213, a second sensor 215, and a third sensor216 are mounted in chamber 28 of case 22. First sensor 213 is locatedbelow latch head 54 in the vertical direction. When latch head 54 is inthe latching position, latch head 54 is spaced from first sensor 213(FIG. 5). When latch head 54 is in the unlatching position, latch head54 presses against first sensor 213 (FIG. 9). Second sensor 215 islocated below returning member 63 in the vertical direction. When firstfollower ring 98 of unlatching mechanism 86 is in the release position,an activation rod of second sensor 215 is received in recess 70 ofreturning member 63 (FIG. 5). When first follower ring 98 of unlatchingmechanism 86 is in the pressing position, recess 70 of returning member63 disengages from the activation rod of second sensor 215, andreturning member 63 presses against second sensor 215 (FIG. 9). Thirdsensor 216 is located above stop member 171 in the vertical direction.When stop member 171 is in a non-blocking position, stop member 171presses against third sensor 216. When stop member 171 is in theblocking position, stop member 171 does not press against third sensor216 (FIGS. 5A and 6). First, second, and third sensors 213, 215, and 216can be electrically connected to a burglarproof system such that theburglarproof system can monitor the status of latch device 20.

Latch device 20 is mounted in door 435. Door 435 includes first andsecond sides 437 and 439 and an end face 451 extending between first andsecond sides 437 and 439. Door 435 further includes an installationspace 453 defined by first and second sides 437 and 439 and end face451. A first installation groove 436 is defined in end face 451 and isin communication with installation space 453. A second installationgroove 438 is defined in end face 451, is spaced from first installationgroove 436 in the vertical direction, and is in communication withinstallation space 453. Door 435 is pivotably mounted to an inner sideof a door frame 491 fixed to a wall of a passage. Door frame 491includes a compartment 493 and an inner end face 495. A coupling groove497 is defined in inner end face 495 and is aligned with secondinstallation groove 438. A latch hole 499 is defined in inner end face495, is in communication with compartment 493, and is aligned with firstinstallation groove 436. A side of door 435 is mounted by hinges to doorframe 491, permitting door 435 to pivot relative to door frame 491 abouta pivotal axis defined by the hinges between an open position (FIG. 5)and a closed position (FIGS. 5A, 5B, and 6). When door 435 is in theopen position, end face 451 of door 435 is spaced from inner end face495 of door frame 491 in a circumferential direction about the pivotalaxis of door 435. When door 435 is in the closed position, end face 451of door 435 is aligned with inner end face 495 of door frame 491.

Faceplate 42 is received in first installation groove 436 of door 435.Case 22 is received in installation space 453. First operating device455 is mounted to first side 437 of door 435. Second operating device473 is mounted to second side 439 of door 435.

According to the form shown, first operating device 455 includes twomounting posts 471 extending through door 435 and case 22. Firstoperating device 455 further includes a first spindle 459 and a firsthandle 457 connected to first spindle 459. First spindle 459 extendsthrough first side 437 of door 435 and case 22 and is coupled to firstdriven ring 88, permitting joint pivotal movement of first driven ring88 and first spindle 459. Thus, when first handle 457 is pivoted, firstspindle 459 is driven to pivot first driven ring 88.

According to the form shown, second operating device 473 includes twobolts 479 extending through door 435 and threadedly engaged withmounting posts 471. Second operating device 473 includes a secondspindle 477 and a second handle 475 connected to second spindle 477.Second spindle 477 extends through second side 439 of door 435 and lid217 and is coupled to second driven ring 135, permitting joint pivotalmovement of second driven ring 135 and second spindle 477. Thus, whensecond handle 475 is pivoted, second spindle 477 is driven to pivotsecond driven ring 135.

According to the form shown, door lock 10 further includes a wirelesscharging device 511. Wireless charging device 511 includes a transmitter513 and a receiver 515. Transmitter 513 includes a wireless transmittingcircuit 513A and an antenna 513B electrically connected to wirelesstransmitting circuit 513A. Receiver 515 includes a charging circuit 515Aand an antenna 515B electrically connected to charging circuit 515A.

Receiver 515 is fixed in second installation groove 438 of door 435 andis received in installation space 453. Transmitter 513 is fixed incoupling groove 497 and is received in compartment 493. Transmitter 513is electrically connected to a mains power or a terminal of any otherpower supply to obtain the electricity required for operation oftransmitter 513.

According to the form shown, door lock controller 611 of door accesscontrol system 9 includes a control module 613 and a power supply unit614 electrically connected to the control module 613. The power supplyunit 614 can be in the form of a battery. Power supply unit 614 is fixedto a housing of receiver 515 of wireless charging device 511 (FIG. 3Aand FIG. 3C). Power supply unit 614 is further electrically connected tocharging circuit 515A of receiver 515 of wireless charging device 511(FIG. 3C). Control module 613 is electrically connected to motor 351 oflocking mechanism 251 of door lock 10. Thus, control module 613 cancontrol motor 351 to rotate in the forward or reverse direction or tostop.

According to the form shown, door lock controller 611 is received in ahousing of first operating device 455. Door lock controller 611 includesan active induction module 617 electrically connected to control module613. Active induction module 617 includes a near field communication(NFC) radio frequency transmission function. Door lock controller 611further includes an authorization button 631 and an authorizationcancellation button 633. Authorization button 631 is exposed and iselectrically connected to control module 613 for carrying out the dooraccess authority authorization function. Authorization cancellationbutton 633 is exposed and is electrically connected to control module613 for carrying out the door access authority cancellation function. Areset button 635 is mounted in door lock controller 611 and iselectrically connected to control module 613 for carrying out a resetfunction. A main memory 615 is electrically connected to control module613. At least one authorized management identification number is storedin main memory 615. Control module 613 can drive active induction module617 to read main control unit 659 and passive opening unit 673.

According to the form shown, door lock controller 611 further includesan infrared activation module 637 electrically connected to controlmodule 613, an inertia detection module 653 electrically connected tocontrol module 613, and an alarm device 655 electrically connected tocontrol module 613. Alarm device 655 can be a buzzer.

Main control unit 659 includes a key tag 671 having a memory in which amanagement identification number is stored. Key tag 671 can be of thetype carrying a passive radio frequency identification tag. Main controlunit 659 further includes a radio frequency identification (RFID)communication controllable device 670 having a memory. RFIDcommunication controllable device 670 includes an NFC radio frequencytransmission function. A door access control program is installed inRFID communication controllable device 670 and includes a user addingfunction, a user cancelling function, a synchronization function, and acloud log-in function. The door access control program is configured forobtaining a management identification number for RFID communicationcontrollable device 670, and this management identification number isstored in the memory of RFID communication controllable device 670.Control module 613 is configured for driving active induction module 617to read RFID communication controllable device 670 and to obtain themanagement identification number of RFID communication controllabledevice 670.

RFID communication controllable device 670 can be a mobile device, suchas a mobile phone, a personal digital assistant, or a tablet. The dooraccess control program is downloaded and installed in RFID communicationcontrollable device 670. In a case that RFID communication controllabledevice 670 is a mobile device, the door access control program obtainsthe international mobile equipment identity (IMEI) of RFID communicationcontrollable device 670 and sets the IMEI of RFID communicationcontrollable device 670 as the management identification number which isstored in the memory of RFID communication controllable device 670.Furthermore, the door access control program generates an “accessauthority” icon on a screen of RFID communication controllable device670 for performing an authority request function. Furthermore, the dooraccess control program generates an “adding user” icon on the screen ofRFID communication controllable device 670 for performing a function ofadding a user. Furthermore, the door access control program generates an“deleting user” icon on the screen of RFID communication controllabledevice 670 for performing a function of deleting a user. Furthermore,the door access control program generates a “synchronization” icon onthe screen of RFID communication controllable device 670 for performinga function of synchronization. Furthermore, the door access controlprogram can generate a “cloud login” icon on the screen of RFIDcommunication controllable device 670 for performing a function oflogging in a cloud server.

Passive door opening unit 673 includes an RFID communication device 677having the NFC RFID transmission function. A door opening program isinstalled in RFID communication device 677 to obtain an accessidentification number which is stored in a memory of RFID communicationdevice 677. Passive door opening unit 673 further includes an inductivecard 675 having a pre-set access identification number.

RFID communication device 677 can be a mobile device, such as a mobilephone, a personal digital assistant, or a tablet. The door openingprogram is downloaded and installed in RFID communication device 677.When RFID communication device 677 executes the door opening program,the door opening program obtains the access identification number andstores the access identification number in the memory of RFIDcommunication device 677. In a case that RFID communication device 677is a mobile device, the door opening program obtains the internationalmobile equipment identity (IMEI) of RFID communication device 677 andsets the IMEI of RFID communication device 677 as the accessidentification number which is stored in the memory of RFIDcommunication device 677. Furthermore, the door opening programgenerates an “access authority” icon on a screen of RFID communicationdevice 677 for performing an authority function (for requesting dooraccess authority if operated together with authorization button 631 orfor requesting cancellation of door access authority if operatedtogether with authorization cancellation button 633).

It can be appreciated that the door opening program installed in RFIDcommunication device 677 can be the same as the door access programinstalled in RFID communication controllable device 670.

Door access control system 9 can use authorization button 631,authorization cancellation button 633, and reset button 635 to proceedwith authorization of door access authority and cancellation of dooraccess authority. In particular, for the sake of explanation, it will beassumed that door access control system 9 has not yet transmitted thedoor lock management control authority to RFID communicationcontrollable device 670 through wireless transmission. In this case, thehousing of first operating device 455 is detached to expose reset button635. Next, the “access authority” icon on the screen of RFIDcommunication controllable device 670 and reset button 635 of door lockcontroller 611 are pressed. Then, RFID communication controllable device670 is placed within a communication range of active induction module617. Active induction module 617 reads the management identificationnumber stored in RFID communication controllable device 670 and storesthe management identification number of RFID communication controllabledevice 670 in main memory 615. Thus, RFID communication controllabledevice 670 is granted the door lock management control authority (andthe door access authority, if desired).

With regard to authorization of the door lock management control to keytag 671, reset button 635 in door lock controller 611 is pressed (notethat the housing of first operating device 455 is detached to permitpressing of reset button 635), and key tag 671 is placed within acommunication range of active induction module 617. Active inductionmodule 617 reads the management identification number of key tag 671 andstores the management identification number of key tag 671 in mainmemory 615. Thus, key tag 671 is granted the door lock managementcontrol authority (and the door access authority, if desired).

In a case that infrared activation module 637 is controlled by controlmodule 13 and detects that no object is near door lock controller 611,control module 613 controls active induction module 617 to hibernate,such that power supply unit 614 will not supply electricity to activeinduction module 617 under control of control module 613.

In a case that it is desired to use key tag 671 to authorize the dooraccess authority to passive door opening unit 673, key tag 671 is placedwithin the detection range of infrared activation module 637 and withinthe communication range of active induction module 617. Control module613 controls power supply unit 614 to provide electricity to activeinduction module 617 and, thus, awakes active induction module 617 toread the management identification number of key tag 671. The managementidentification number of key tag 671 is sent to control module 613 andis compared with at least one authorized management identificationnumber in main memory 615. Operation of authorization button 631 andauthorization cancellation button 633 is permitted when control module613 identifies that the management identification number of key tag 671is identical to one of the at least one authorized managementidentification number of main memory 615 On the other hand, operation ofauthorization button 631 and authorization cancellation button 633 isprevented when control module 613 identifies that the managementidentification number of key tag 671 is not identical to any one of theat least one authorized management identification number in main memory615.

In a case that control module 613 identifies that the managementidentification number of key tag 671 is identical to one of the at leastone authorized management identification number in main memory 615,authorization button 631 of door lock controller 611 can be pressed forgranting the door access authority to RFID communication device 677.After the “access authority” icon on RFID communication device 677executing the near field communication function and executing the dooropening program is pressed, RFID communication device 677 is placedwithin the communication range of active induction module 617 of controlmodule 613. Active induction module 617 reads the access identificationnumber of RFID communication device 677, and control module 613 adds theaccess identification number of RFID communication device 677 into anaccess list in main memory 615 and sets the access identification numberof RFID communication device 677 as an authorized access identificationnumber. The access list in main memory 615 stores at least oneauthorized door access number. Thus, RFID communication device 677 isgranted the door access authority.

Note that when RFID communication device 677 does not execute the dooropening program, control module 613 is prevented from obtaining theaccess identification number through active induction module 617 even ifRFID communication device 677 is within the communication range ofactive induction module 617.

As for granting the door access authority to inductive card 675, key tag671 is placed within the detection range of infrared activation module637 and within the communication range of active induction module 617.Active induction module 617 is awakened to read and obtain themanagement identification number of key tag 671. The managementidentification number of key tag 671 is sent to control module 613 andis compared with at least one authorized management identificationnumber in main memory 615. In a case that control module 613 identifiesthat the management identification number of key tag 671 is identical toone of the at least one authorized management identification number inmain memory 615, authorization button 631 is pressed, and inductive card675 is placed within the communication range of active induction module617. Active induction module 617 reads the pre-set access identificationnumber of inductive card 675, and control module 613 adds the pre-setaccess identification number of inductive card 675 into the access listin main memory 615 and sets the pre-set access identification number ofinductive card 675 as an authorized access identification number. Thus,inductive card 675 is granted the door access authority.

When it is desired to cancel the door access authority of RFIDcommunication device 677 by using key tag 671, key tag 671 is placedwithin the detection range of infrared activation module 637 and withinthe communication range of active induction module 617, and activeinduction module 617 reads and obtains the management identificationnumber of key tag 671. The management identification number of key tag671 is sent to control module 613 and is compared with the at least oneauthorized management identification number in main memory 615. In acase that control module 613 identifies that the managementidentification number of key tag 671 is identical to one of the at leastone authorized management identification number in main memory 615,authorization cancellation button 633 of control module 613 is pressed.After the “access authority” icon on RFID communication device 677executing the near field communication function and executing the dooropening program is pressed, RFID communication device 677 is placedwithin the communication range of active induction module 617. Activeinduction module 617 reads the access identification number of RFIDcommunication device 677, and control module 613 delete the accessidentification number of RFID communication device 677 from the accesslist in main memory 615 or simply cancels the door access authority ofRFID communication device 677. Thus, the door access authority of RFIDcommunication device 677 is cancelled.

When it is desired to cancel the door access authority of conductivecard 675 by using key tag 671, key tag 671 is placed within thecommunication range of active induction module 617, and active inductionmodule 617 reads and obtains the management identification number of keytag 671. The management identification number of key tag 671 is sent tocontrol module 613 and is compared with the at least one authorizedmanagement identification number in main memory 615. In a case thatcontrol module 613 identifies that the management identification numberin key tag 671 is identical to one of the at least one authorizedmanagement identification number in main memory 615, authorizationcancellation button 633 of door lock controller 611 is pressed.Inductive card 675 is placed within the communication range of activeinduction module 617. Active induction module 617 reads the pre-setaccess identification number of inductive card 675, and control module613 delete the pre-set access identification number of inductive card675 from the access list in main memory 615 or simply cancels the dooraccess authority of inductive card 675. Thus, the door access authorityof conductive card 675 is cancelled.

When it is desired to grant the door access authority to RFIDcommunication device 677, RFID communication controllable device 670executes the door access control program and executes the near fieldcommunication function, and the “adding user” icon on the screen of RFIDcommunication controllable device 670 is pressed. RFID communicationdevice 677 executes the near field communication function and executesthe door opening program, and the “access authority” icon on the screenof RFID communication device 677 is pressed to perform the user addingfunction. Then, RFID communication device 677 is placed within thecommunication range of RFID communication controllable device 670. RFIDcommunication controllable device 670 obtains and adds the accessidentification number of RFID communication device 677 into the accesslist in the memory of RFID communication controllable device 670, andsets the access identification number of RFID communication device 677as an authorized access identification number. Then, the“synchronization” icon of RFID communication device 677 is pressed, andthe door access control program executes a countdown program. RFIDcommunication controllable device 670 is placed within the detectionrange of infrared activation module 637 and within the communicationrange of active induction module 617 (to awaken active induction module617) within a period of time counting from pressing of the“synchronization” icon. The authorized access identification numbers inthe access list of RFID communication controllable device 670 (includingthe access identification number of RFID communication device 677) aresent by RFID communication controllable device 670 to the main memory615 and are stored in the access list in main memory 615 to grant thedoor access authority to RFID communication device 677 as well as otherauthorized access identification numbers in the access list of RFIDcommunication controllable device 670. Note that the synchronizationfunction starts after the “synchronization” icon is pressed and afterRFID communication controllable device 670 is placed within thedetection range of infrared activation module 637 and within thecommunication range of active induction module 617. On the other hand,the synchronization function is not carried out if RFID communicationcontrollable device 670 is not placed within the communication range ofactive induction module 617 within the period of time counting frompressing of the “synchronization” icon.

It can be appreciated that if control module 613 identifies that themanagement identification number in RFID communication controllabledevice 670 is identical to the authorized management identificationnumber in main memory 615, control module 613 accepts synchronization tocreate an access list in main memory 615 identical to the access list inRFID communication controllable device 670. On the other hand, ifcontrol module 613 identifies that the management identification numberin RFID communication controllable device 670 is not identical to theauthorized management identification number in main memory 615,synchronization of the access list of control module 613 is not carriedout.

Note that when RFID communication controllable device 670 does notexecute the door access control program, control module 613 is preventedfrom obtaining the access identification number through active inductionmodule 617 even if RFID communication controllable device 670 is withinthe communication range of active induction module 617. Alternatively,when RFID communication controllable device 670 is not within thedetection range of infrared activation module 637, active inductionmodule 617 is in the hibernation state and, thus, cannot read themanagement identification number of RFID communication controllabledevice 670 even if RFID communication controllable device 670 executesthe door access control program and is within the communication range ofactive induction module 617.

As for granting the door access authority to inductive card 675 by usingRFID communication controllable device 670, RFID communicationcontrollable device 670 executes the door access control program andexecutes the near field communication function, and the “adding user”icon on the screen of RFID communication controllable device 670 ispressed. Inductive card 675 is placed within the communication range ofRFID communication controllable device 670. RFID communicationcontrollable device 670 obtains and adds the pre-set accessidentification number of inductive card 675 into the access list in thememory of RFID communication controllable device 670, and sets pre-setaccess identification number of inductive card 675 as an authorizedaccess identification number. Then, the “synchronization” icon of RFIDcommunication controllable device 670 is pressed, and the door accesscontrol program executes a countdown program. RFID communicationcontrollable device 670 is placed within the communication range ofactive induction module 617 within a period of time counting frompressing of the “synchronization” icon. The authorized accessidentification numbers in the access list of RFID communicationcontrollable device 670 (including the pre-set access identificationnumber of inductive card 675) are sent to control module 613 and arestored in the access list in main memory 615 to grant the door accessauthority to inductive card 675 as well as other authorized accessidentification numbers in the access list of RFID communicationcontrollable device 670.

When it is desired to use RFID communication controllable device 670 tocancel the door access authority of RFID communication device 677 orinductive card 675, RFID communication controllable device 670 executesthe door access control program to retrieve the access list. The accesslist is displayed on the screen of RFID communication controllabledevice 670. The user of RFID communication controllable device 670selects an authorized access identification number (which is the same asthe access identification number of RFID communication device 677executing the near field communication function and executing the dooropening program or the pre-set access identification number of inductivecard 675) from the access list on the screen and presses the “deleteuser” icon on the screen of RFID communication controllable device 670.Then, the “synchronization” icon of RFID communication controllabledevice 670 is pressed, and the door access control program executes thecountdown program. RFID communication controllable device 670 is placedwithin the detection range of infrared activation module 637 and withinthe communication range of active induction module 617 within a periodof time counting from pressing of the “synchronization” icon. Theauthorized access identification numbers in the access list of RFIDcommunication controllable device 670 (excluding the accessidentification number of RFID communication device 677 or inductive card675) are sent to control module 613 and stored in the access list inmain memory 615. Thus, the door access authority of RFID communicationdevice 677 or inductive card 675 is cancelled.

Now that the basic construction of door access control system 9 has beenexplained, the operation and some of the advantages of door accesscontrol system 9 can be set forth and appreciated. In particular, forthe sake of explanation, it will be assumed that first side 437 of door435 in FIGS. 1-12 is the outer side, and second side 439 of door 435 isthe inner side. A switching screw 235 threadedly engages with firstscrew hole 39 of case 22 and presses against one of outer surfaces 294of locking block 291 to bias locking block 291 to the second position(FIG. 8). Thus, locking groove 313 of locking block 291 is aligned withfirst driven ring 88 in the axial direction of guiding block 317 and isspaced from second driven ring 135 in the axial direction of guidingblock 317.

FIG. 5 shows door 435 in an open position. Receiver 515 of wirelesscharging device 511 is spaced from transmitter 513 in thecircumferential direction about the pivotal axis of door 435. Thus,receiver 515 cannot receive the radio wave from transmitter 513 tocharge power supply unit 614. In this case, latch head 54 is in thelatching position. Safety bolt 62 extends beyond faceplate 42. Followerarm 177 of stop member 171 is stopped by push face 60 of stem 58 and isretained in the non-blocking position permitting movement of latch head54 from the latching position to the unlatching position. Locking block291 is in the rear position. Locking groove 313 of locking block 291 isspaced from first protrusion 90 of first driven ring 88 and firstprojection 137 of second driven ring 135 in the transverse direction,setting locking mechanism 251 to be in an unlocking state permittingfirst handle 457 and second handle 475 to actuate first follower ring 98from the release position to the pressing position. Furthermore, thirdsensor 216 is pressed when stop member 171 is in the non-blockingposition, such that the door access control system or the burglarproofsystem can detect door 435 is in the open position.

With reference to FIG. 5A, if door 435 is moved from the open positionto the closed position, receiver 515 of wireless charging device 511 isaligned with transmitter 513 in the circumferential direction about thepivotal axis of door 435 (FIG. 5B). Thus, receiver 515 is close totransmitter 513 such that receiver 515 can receive the radio wave fromtransmitter 513, can convert the radio wave into electricity, and canstore the electricity in power supply unit 614. Latch head 54 extendsinto latch hole 499 of door frame 491. Safety bolt 62 is pressed byinner end face 495 of door frame 491 and retracts into chamber 28 ofcase 22. Thus, stop member 171 is pressed by first tang 191 of secondtorsion spring 179 and pivots from the non-blocking position (FIG. 5) tothe blocking position (FIG. 5A). Stop end 175 pivots to a movement pathof latch head 54 between the latching position and the unlatchingposition. Thus, picking of latch head 54 via a gap between door 435 anddoor frame 491 is prevented. When stop member 171 is in the blockingposition, third sensor 216 is not pressed, and the door access controlsystem or the burglarproof system can detect door 435 is in the closedposition.

When first handle 457 of first operating device 455 pivots in the stateshown in FIG. 5A (locking mechanism 251 is in the unlocking state),first driven ring 88 is driven by first spindle 459, and secondprotrusion 92 of first driven ring 88 presses against and moves bridgingmember 155. Then, bridging member 155 actuates first and second followerrings 98 and 119 to pivot from the release position to the pressingposition about the pivot axis defined by first and second pivotal holes38 and 219. At the same time, bridging member 155 actuates returningmember 63 to pivot about the first pivot axis defined by first axle 30and to twist first torsion spring 72 by second tang 76 to create thereturning force. Returning member 63 presses against second sensor 215,and the door access control system or the burglarproof system detectsthat somebody is opening door 435. Follower portion 99 of first followerring 98 presses against shank 50 while first follower ring 98 ofunlatching mechanism 86 pivots from the release position to the pressingposition, and latch head 54 moves from the latching position to theunlatching position. Connecting member 52 presses against stop member171 while latch head 54 moves from the latching position to theunlatching position, moving stop member 171 from the blocking positionto the non-blocking position to permit movement of latch head 54 fromthe latching position to the unlatching position. At the same time,latch head 54 presses against push face 60 of stem 58 and actuatessafety bolt 62 to retract into chamber 28 of case 22 while stop end 175of stop member 171 is retained in the non-blocking position by latchhead 54. After first follower ring 98 of unlocking mechanism 86 hasreached the pressing position, latch head 54 is in the unlatchingposition (FIG. 9) outside of latch hole 499, permitting opening of door435. Furthermore, first sensor 213 is pressed by latch head 54 such thatthe door access control system or the burglarproof system detects thatlatched head 54 is in the unlatching position.

If first handle 457 of first operating device 455 is released after door435 has been opened, first spring 55 biases latch head 54 from theunlatching position to the latching position. At the same time, firsttorsion spring 72 biases returning member 63 to pivot and causes firstand second follower rings 98 and 119 and first driven ring 88 to pivotfrom the pressing position to the release position, returning firsthandle 457 to the original, horizontal position. Since safety bolt 62 isnot stopped by door frame 491, second spring 65 biases safety bolt 62 toextend beyond faceplate 42. Furthermore, push face 60 of stem 58 pressesagainst follower arm 177 of stop member 171 to pivot stop member 171from the blocking position to the non-blocking position.

If second handle 475 of second operating device 473 pivots in the stateshown in FIG. 5A, second spindle 477 is actuated by second driven ring135 to pivot, and second projection 139 of second driven ring 135presses against first engagement end 157 of bridging member 155. Thus,bridging member 155 actuates first and second follower rings 98 and 119to pivot from the release position to the pressing position about thepivot axis defined by first and second pivotal holes 38 and 219. At thesame time, bridging member 155 actuates returning member 63 to pivotabout the first pivot axis defined by first axle 30 and twists firsttorsion spring 72 by second tang 76 to create the returning force.Returning member 63 presses against second sensor 215, and theburglarproof system detects that somebody is opening door 435. Followerportion 99 of first follower ring 98 presses against shank 50 whilefirst follower ring 98 of unlatching mechanism 86 pivots from therelease position to the pressing position, and latch head 54 moves fromthe latching position to the unlatching position. Connecting member 52presses against stop member 171 while latch head 54 moves from thelatching position to the unlatching position, moving stop member 171from the blocking position to the non-blocking position to permitmovement of latch head 54 from the latching position to the unlatchingposition. At the same time, latch head 54 presses against push face 60of stem 58 and actuates safety bolt 62 to retract into chamber 28 ofcase 22 while stop end 175 of stop member 171 is retained in thenon-blocking position by latch head 54. After first follower ring 98 ofunlocking mechanism 86 has reached the pressing position, latch head 54is in the unlatching position (FIG. 10) permitting opening of door 435.Furthermore, first sensor 213 is pressed by latch head 54 such that thedoor access control system or the burglarproof system detects thatlatched head 54 is in the unlatching position.

If second handle 475 of second operating device 473 is released afterdoor 435 has been opened, first spring 55 biases latch head 54 from theunlatching position to the latching position. At the same time, firsttorsion spring 72 biases returning member 63 to pivot and causes firstand second follower rings 98 and 119 and first driven ring 88 to pivotfrom the pressing position to the release position, returning secondhandle 475 to the original, horizontal position. Since safety bolt 62 isnot stopped by door frame 491, second spring 65 biases safety bolt 62 toextend beyond faceplate 42. Furthermore, push face 60 of stem 58 pressesagainst follower arm 177 of stop member 171 to pivot stop member 171from the blocking position to the non-blocking position.

When door 435 is closed, door lock controller 611 activates motor 351 ofelectric driving device 339 to thereby rotate driving shaft 355 in theforward direction by using the electricity of power supply unit 614.Specifically, when first follower ring 98 of unlatching mechanism 86 isin the release position, first protrusion 90 of first follower ring 98and first projection 137 of second driven ring 135 are aligned withlocking groove 313 of locking block 291. Thus, when driving shaft 355rotates in the forward direction, driving shaft 355 actuates secondsliding block 359 to move towards unlatching mechanism 86 and tocompress third compression spring 393 in the transverse direction,which, in turn, causes follower plate 397 to push first sliding block319 to move towards unlatching mechanism 86 in the transverse direction.Since locking block 291 is not blocked, first compression spring 333presses against and moves locking block 291 from the rear position (FIG.5A) to the front position (FIGS. 11 and 12). Since locking block 291 isalso in the second position, locking groove 313 of locking block 291engages with first protrusion 90 of first driven ring 88. Thus, firstdriven ring 88 cannot pivot about the pivot axis defined by first andsecond pivot holes 38 and 219. As a result, first operating device 455cannot be operated to unlock door lock, because first handle 457 offirst operating device 455 cannot pivot.

In a case that first operating device 455 cannot unlatch latch head 54,since second driven ring 135 does not engage with locking block 291,latch head 54 can be moved from the latching position to the unlatchingposition by operating second handle 475 of second operating device 473.

Inductive card 675 or RFID communication device 677 can be used tochange locking mechanism 251 from the locking state to the unlockingstate, permitting unlatching of latch device 20 by operating firsthandle 457 of first operating device 455. Specifically, when using RFIDcommunication device 677 to access the door, neither authorizationbutton 631 nor authorization cancellation button 633 is pressed. Thedoor opening program and the near field communication function of RFIDcommunication device 677 are executed, and RFID communication device 677is placed within the detection range of infrared activation module 637and within the communication range of active induction module 617.Infrared activation module 637 detects an object is nearby door lockcontroller 611, such that control module 613 awakes active inductionmodule 617. Active induction module 617 reads the access identificationnumber of RFID communication device 677. Control module 613 compares theaccess identification number of RFID communication device 677 with theaccess list of main memory 615. The door is unlocked if the accessidentification number of RFID communication device 677 is identified tobe identical to one of the at least one authorized access identificationnumber in the access list of main memory 615. Specifically, motor 351 ofelectric driving device 339 can be activated to rotate driving shaft 355in the reverse direction by using the electricity of power supply unit614. Threaded section 357 of driving shaft 355 pushes fourth compressionspring 395 to move away from unlatching mechanism 86 in the transversedirection, and follower plate 397 and first and second sliding blocks319 and 359 move jointly to cause second compression spring 335 to pressagainst and move locking block 291 from the front position to the rearposition. Thus, locking groove 313 of locking block 291 disengages fromfirst protrusion 90 of first driven ring 88, permitting first drivenring 88 to pivot about the pivot axis defined by first and second pivotholes 38 and 219. As a result, first handle 457 of first operatingdevice 455 can be operated to open door 435. On the other hand, if theaccess identification number of RFID communication device 677 isidentified to be not identical to any one of the at least one authorizedaccess identification number in the access list of main memory 615,control module 613 does not move locking block 291 of locking mechanism251 from the front position to the rear position, such that lockingmechanism 251 remains in the locking state. Thus, door 435 cannot beopened by operating first handle 457 of first operating device 455.

Note that when RFID communication device 677 does not execute the dooropening program, control module 613 is prevented from obtaining theaccess identification of RFID communication device 677 through activeinduction module 617 even if RFID communication device 677 is within thecommunication range of active induction module 617.

Accessing the door by using inductive card 675 is substantially the sameas the procedures using RFID communication device 677 except forexecution of the door opening program.

In another case that first side 437 of door 435 is the inner side andsecond side 439 of door 435 is the outer side, first operating device455 is mounted to second side 439 of door 435, and second operatingdevice 473 is mounted to first side 437 of door 435. First spindle 459of first operating device 455 engages with second driven ring 135, andsecond spindle 477 of second operating device 473 engages with firstdriven ring 88 (FIG. 13). Furthermore, switching screw 235 extendsthrough second screw hole 233 of lid 217 and abuts the other outersurface 294 of locking block 291, such that locking block 291 is biasedby switching screw 235 to the first position. Thus, locking block 291 isaligned with second driven ring 135 in the axial direction of guidingblock 317 and is spaced from first driven ring 88 in the axial directionof guiding block 317.

With reference to FIG. 14, when door 435 is closed and when lockingblock 291 is in the front position, first projection 137 of seconddriven ring 135 engages with locking groove 313 of locking block 291,such that second driven ring 135 cannot pivot about the pivot axisdefined by first and second pivotal holes 38 and 219. Furthermore, firsthandle 457 cannot pivot. Thus, a user can not open door 435 by operatingfirst operating device 455.

While first operating device 455 cannot unlatch latch head 54 (lockingblock 291 is in the first position), since first driven ring 88 does notengage with locking block 291, door 435 can be opened by operatingsecond handle 475 of second operating device 473 to move latch head 54from the latching position to the unlatching position.

In addition to the locking function provided by locking mechanism 251,door lock 10 permits mistaken operation. Specifically, when door lock 10is in a state shown in FIG. 10, latch head 54 is in the unlatchingposition, locking block 291 is in the second position, and firstprojection 137 of second driven ring 135 is not aligned with lockinggroove 313 of locking block 291. Since first projection 137 of seconddriven ring 135 is in the movement path of locking block 291 from therear position to the front position, if driving shaft 355 is driven torotate in the forward direction, second sliding block 359 moves towardsunlatching mechanism 86 in the transverse direction and compresses thirdcompression spring 393. However, locking block 291 is retained in therear position by first projection 137 of second driven ring 135 (FIG.15). Thus, first sliding block 319 moves from the central position thenon-central position (towards unlatching mechanism 86 in the transversedirection) and compresses first compression spring 333. When seconddriven ring 135 is returned to a position in which first projection 137is aligned with locking groove 313 of locking block 291 (namely, firstfollower ring 98 is in the release position), first compression spring333 presses locking block 291 from the rear position to the frontposition. Locking mechanism 251 is set to be in the locking state. Notethat the mistaken operation is also effective when locking block 291 isin the first position.

Locking mechanism 251 further permits another mistaken operation.Specifically, referring to FIG. 7, when locking block 291 is in the rearposition, if motor 351 drives driving shaft 355 to rotate in the reversedirection, second sliding block 359 moves away from unlatching mechanism86 in the transverse direction and compresses fourth compression spring395. Furthermore, first sliding block 319 is actuated to move from thecentral position to the non-central position and compresses secondcompression spring 335. However, after first and second sliding blocks319 and 359 have moved through a small distance away from unlatchingmechanism 86 in the transverse direction, screw hole 391 of secondsliding block 359 disengage from threaded section 357 of driving shaft355. Thus, driving shaft 355 cannot keep actuating first and secondsliding blocks 319 and 359 away from unlatching mechanism 86 in thetransverse direction (FIG. 16). Since fourth compression spring 395biases second sliding block 359, even though screw hole 391 of secondsliding block 359 has disengaged from threaded section 357 of drivingshaft 355, the end face of screw hole 391 of second sliding block 359still abuts an end of threaded section 357 of driving shaft 355. Thisassures that threaded section 357 of driving shaft 355 will immediatelyengage with screw hole 391 of second sliding block 359 while drivingshaft 355 starts to rotate in the forward direction.

Wireless charging device 511 can continuously charge power supply unit614 while door 435 is in the closed position, greatly increasing theoperation time of door lock 10 and locking mechanism 251 while reducingthe possibility of malfunction of door lock 10 resulting from shortageof electricity of power supply unit 614. Furthermore, since power supplyunit 614 will be charged while door 435 is in the closed position, thebattery replacement frequency can be reduced to increase the useconvenience of electrically controlled door lock 10.

The originally set state of locking mechanism 251 will not change evenif power interruption of battery power supply unit 614 occurs. Namely,no matter locking mechanism 251 is set to be in the locking or unlockingstate, the locking or unlocking state of locking mechanism 251 will notchange even if power interruption of power supply unit 614 occurs, whichis advantageous to door access control.

Door access control system 9 further includes a burglar preventionfunction. Specifically, inertia detection unit 653 of door lockcontroller 611 does not output a signal to control module 613 if dooraccess control system 9 is not stricken by an external force, such thatpower supply unit 614 does not provide electricity to alarm device 655under control of control module 613. Thus, alarm device 655 does notoperate. On the other hand, when door access control system 9 isstricken by an external force, inertia detection unit 653 detectsvibrations of door access control system 9 and outputs a signal tocontrol module 613. Thus, power supply unit 614 supplies electricity toalarm device 655 under control of control module 613, and alarm device6155 sends out an alarm message.

RFID communication controllable device 670 can store the door accessrecord of RFID communication device 677 and inductive card 675. RFIDcommunication controllable device 670 can receive the door access recordfrom active induction module 617 by point-to-point transmission. Activeinduction module 617 can use a radio frequency of one of near fieldcommunication, high frequency, and ultrahigh frequency to transmit.

Locking mechanism 251 permits mistaken operation. Namely, when lockingblock 291 cannot move, motor 351 can still be activated to rotatedriving shaft 355, which, in turn, moves first and second sliding blocks319 and 359 in the transverse direction, preventing motor 351 from beingdamaged by the resistance. Furthermore, when driving shaft 355 rotatesin the forward position while locking block 291 is retained in the rearposition, since first compression spring 33 is compressed, if the factorof locking block 291 vanishes (such as release of first handle 457 orsecond handle 475, which is on the outer side), first compression spring333 will immediately press locking block 291 to move from the rearposition to the front position, avoiding unreliable setting of door lock10 due to mistaken operation.

Furthermore, locking block 291 of locking mechanism 251 can rapidly bemounted to be in the first position or the second position according tothe indoor and outdoor positions of the site on which door lock 10 ismounted, providing highly convenience in installation of door lock 10.

Door access control system 9 is suitable for a mobile device with an NFCfunction. Furthermore, door access control system 9 combines with thecommunication technology to achieve effective management. Furthermore,production of inductive card 675 and dispatching inductive card 675 tothe user do not require door access control system 9 to use the NFCtechnology.

Now that the basic teachings of the present invention have beenexplained, many extensions and variations will be obvious to one havingordinary skill in the art. For example, wireless charging device 511 canbe utilized on door lock 10 of other types other than the illustratedtype, including, but not limited to, a commercially available type.Furthermore, charging of battery 517 can be achieved by magneticinduction or magnetic resonance.

Thus since the illustrative embodiments disclosed herein may be embodiedin other specific forms without departing from the spirit or generalcharacteristics thereof, some of which forms have been indicated, theembodiments described herein are to be considered in all respectsillustrative and not restrictive. The scope is to be indicated by theappended claims, rather than by the foregoing description, and allchanges which come within the meaning and range of equivalency of theclaims are intended to be embraced therein.

1. A door access control system comprising: a passive door opening unitincluding a first memory storing an access identification number; a maincontrol unit including a second memory storing a managementidentification number; a door lock including a latch head slideablebetween a latching position and an unlatching position, with the doorlock further including a locking mechanism operably connected to thelatch head, with the door lock adapted to be mounted to a door; acontrol module connected to the locking mechanism and controlling thelocking mechanism to be in a locking state preventing movement of thelatch head from the latching position to the unlatching position or anunlocking state permitting movement of the latch head from the latchingposition to the unlatching position; a power supply unit electricallyconnected to the control module; a main memory electrically connected tothe control module, with the main memory storing an access listconsisting of at least one authorized management identification numberand at least one authorized access identification number; an activeinduction module electrically connected to the control module, with thecontrol module configured for driving the active induction module toread the access identification number of the passive door opening unitand the management identification number of the main control unit; aninfrared activation module electrically connected to the control module;an authorization button electrically connected to the control module,with the authorization button configured for performing authorization ofdoor access authority; an authorization cancellation button electricallyconnected to the control module, with the authorization cancellationbutton configured for performing cancellation of door access authority,wherein when the main control unit or the passive door opening unit iswithin a detection range of the infrared activation module, the controlmodule permits the power supply unit to provide electricity to theactive induction module for operation, wherein when the main controlunit or the passive door opening unit is within a detection range of theinfrared activation module, the control module does not permit the powersupply unit to provide electricity to the active induction module,wherein when the active induction module operates and when the maincontrol unit is within the communication range of active inductionmodule, the active induction module is permitted to read the managementidentification number of the main control unit, wherein when the activeinduction module operates and when the main control unit is outside ofthe communication range of active induction module, the active inductionmodule is prevented from reading the management identification number ofthe main control unit, wherein if the control module identifies that themanagement identification number of the main control unit is identicalto the at least one authorized management identification number of themain memory, operations of the authorization button and theauthorization cancellation button respectively for the authorization ofdoor access authority and cancellation of door access authority arepermitted, wherein if the control module identifies that the managementidentification number of the main control unit is not identical to anyof the at least one authorized management identification number of themain memory, operations of the authorization button and theauthorization cancellation button respectively for authorization of dooraccess authority and cancellation of door access authority areprevented, wherein if the authorization button is operated and if thepassive door opening unit is placed within the communication range ofthe active induction module, the control module obtains the accessidentification number of the passive door opening unit through theactive induction module and stores the access identification number ofthe passive door opening unit in the main memory, and the control moduleadds the access identification number of the passive door opening unitinto the access list of the main memory and sets the accessidentification number of the passive door opening unit as an authorizedaccess identification number to grant door access authority to thepassive door opening unit, wherein if the authorization cancellationbutton is operated and if the passive door opening unit is placed withinthe communication range of the active induction module, the controlmodule obtains the access identification number of the passive dooropening unit through the active induction module and compares the accessidentification number of the passive door opening unit with the accesslist of the main memory, and the control module deletes the accessidentification number of the passive door opening unit from the accesslist of the main memory or cancels the door access authority of theaccess identification number of the passive door opening unit to cancelthe door access authority of the passive door opening unit, wherein whenthe active induction module operates and when the passive door openingunit is within the communication range of the active induction module,the active induction module is permitted to read the accessidentification number of the passive door opening unit, wherein when theactive induction module operates and when the passive door opening unitis outside of the communication range of the active induction module,the active induction module is prevented from reading the accessidentification number of the passive door opening unit, when none of theauthorization button and the authorization cancellation button areoperated, the control module controls the locking mechanism to be in theunlocking state if the access identification number of the passive dooropening unit is read by the active induction module and is identified tobe identical to the at least one authorized access identification numberin the main memory, and wherein when none of the authorization buttonand the authorization cancellation button are operated, the controlmodule controls the locking mechanism to be in the locking state if theaccess identification number of the passive door opening unit is read bythe active induction module and is identified to be not identical to anyone of the at least one authorized access identification number in themain memory.
 2. The door access control system as claimed in claim 1,further comprising: a receiver electrically connected to the powersupply unit, with the receiver including a charging circuit and anantenna electrically connected to the charging circuit, with thereceiver adapted to be mounted to the door; and a transmitter includinga wireless transmitting circuit and an antenna electrically connected tothe wireless transmitting circuit, with the transmitter adapted to bemounted to a door frame to which the door is pivotably mounted, with thetransmitter adapted to be connected to a power supply, wherein when thedoor is in the open position, the receiver is not aligned with thetransmitter, and wherein when the door is in the closed position, thereceiver is aligned with the transmitter, the receiver receives radiowave from the transmitter, converts the radio wave into electricity, andstores the electricity in the power supply unit.
 3. The door accesscontrol system as claimed in claim 1, with the main control unitincluding a radio frequency identification communication controllabledevice having the second memory, with the radio frequency identificationcommunication controllable device configured for installing a dooraccess control program for performing a user adding function, a userdeletion function, and a synchronization function, with the door accesscontrol program configured for generating the management identificationnumber and storing the management identification number in the secondmemory of the radio frequency identification communication controllabledevice, with the passive door opening unit including a radio frequencyidentification communication device including the first memory, with theradio frequency identification communication device configured forinstalling a door opening program, with the door opening programconfigured for generating the access identification number and storingthe access identification number in the first memory of the radiofrequency identification communication device, wherein when the radiofrequency identification communication device executes the door openingprogram, the control module is permitted to read the accessidentification number of the RFID communication device through theactive induction module if the radio frequency identificationcommunication device is placed within the communication range of theactive induction module, wherein when the radio frequency identificationcommunication device does not execute the door opening program, thecontrol module is prevented from reading the access identificationnumber of the RFID communication device through the active inductionmodule even if the radio frequency identification communication deviceis placed within the communication range of the active induction module,wherein when radio frequency identification communication controllabledevice executes the door access control program, the control module ispermitted to read the management identification number of the radiofrequency identification communication controllable device through theactive induction module even if the radio frequency identificationcommunication controllable device is placed within the communicationrange of the active induction module, wherein when radio frequencyidentification communication controllable device does not execute thedoor access control program, the control module is prevented fromreading the management identification number of the radio frequencyidentification communication controllable device through the activeinduction module if the radio frequency identification communicationcontrollable device is placed within the communication range of theactive induction module, wherein when the radio frequency identificationcommunication controllable device and the radio frequency identificationcommunication device respectively execute the door access controlprogram and the door opening program, the radio frequency identificationcommunication controllable device is permitted to read the accessidentification number of the radio frequency identificationcommunication controllable device if the radio frequency identificationcommunication device is placed within the communication range of theradio frequency identification communication controllable device,wherein when the radio frequency identification communication device islocated outside of the communication range of the radio frequencyidentification communication controllable device or when the radiofrequency identification communication device does not execute the dooropening program or when the radio frequency identification communicationcontrollable device does not execute the door access control program,the radio frequency identification communication controllable device isprevented from reading the access identification number of the radiofrequency identification communication device, wherein when the radiofrequency identification communication controllable device executes theuser adding function, if the radio frequency identificationcommunication device is within the communication range of the radiofrequency identification communication controllable device, the radiofrequency identification communication controllable device adds theaccess identification number of the radio frequency identificationcommunication device into an access list of the radio frequencyidentification communication controllable device and sets the accessidentification number of the radio frequency identificationcommunication device as an authorized access identification number togrant the door access authority to the radio frequency identificationcommunication device, wherein when the radio frequency identificationcommunication controllable device executes the user cancellationfunction, the radio frequency identification communication controllabledevice selects and deletes one of the access identification numbers fromthe access list of the radio frequency identification communicationcontrollable device or cancels the door access authority of the selectedaccess identification number, wherein when the radio frequencyidentification communication controllable device executes thesynchronization function, the radio frequency identificationcommunication controllable device is placed within the communicationrange of the active induction module, the control module is permitted toobtain the management identification number of the radio frequencyidentification communication controllable device through the activeinduction module, wherein if the control module identifies themanagement identification number of the radio frequency identificationcommunication controllable device is identical to one of the at leastone authorized management identification number of the main memory, theaccess list of the main memory is synchronized to be identical as theaccess list of the radio frequency identification communicationcontrollable device, and wherein if the control module identifies themanagement identification number of the radio frequency identificationcommunication controllable device is not identical to any one of the atleast one authorized management identification number of the mainmemory, synchronization of the access list of the main memory to beidentical as the access list of the radio frequency identificationcommunication controllable device is prevented.
 4. The door accesscontrol system as claimed in claim 3, wherein execution of the dooraccess control program includes obtaining an international mobileequipment identity of the RFID communication controllable device,setting the international mobile equipment identity of the RFIDcommunication controllable device as the management identificationnumber, and storing the management identification number in the secondmemory of the radio frequency identification communication controllabledevice, and wherein execution of the door opening program includesobtaining an international mobile equipment identity of the RFIDcommunication device, setting the international mobile equipmentidentity of the RFID communication device as the access identificationnumber, and storing the international mobile equipment identity of theRFID communication device in the first memory of the radio frequencyidentification communication device.
 5. The door access control systemas claimed in claim 3, with the passive door opening unit furtherincluding an inductive card having a pre-set access identificationnumber, wherein when the authorization button is operated and when theinductive card is within the communication range of the active inductionmodule, the main control unit grants door access authority to theinductive card.
 6. The door access control system as claimed in claim 1,further comprising an inertia detection unit electrically connected tothe control module; and an alarm device electrically connected to thecontrol module, wherein when the door access control system is strickenby an external force, the inertia detection unit outputs a signal to thecontrol module, and the control module activates the alarm device tosend out an alarm message.
 7. The door access control system as claimedin claim 1, with the main control unit including a key tag carrying apassive radio frequency identification tag having the second memory, andwith the management identification number stored in the second memory ofthe passive radio frequency identification tag.
 8. The door accesscontrol system as claimed in 1, with the door lock further including: acase adapted to be mounted in the door, with the case including achamber, with the latch head slideably received in the chamber; and anunlatching mechanism pivotably received in the chamber and including afollower portion operatively connected to the latch head, with thefollower portion pivotable between a release position and a pressingposition, with the locking mechanism mounted in the chamber andelectrically connected to the power supply unit, with the lockingmechanism including a locking block movable between a front position anda rear position, with the power supply unit providing electricityrequired for moving the locking block between the front position and therear position, wherein when the latch head is in latching position, ifthe unlatching mechanism pivots from the release position towards thepressing position, the latch head moves from the latching positiontowards the unlatching position, wherein when the unlatching mechanismis in the pressing position, the latch head is in the unlatchingposition, wherein when the locking block is in the front position,pivotal movement of the unlatching mechanism from the release positionto the pressing position is prevented, and wherein when the lockingblock is in the rear position, pivotal movement of the unlatchingmechanism from the release position to the pressing position ispermitted.
 9. The door access control system as claimed in claim 8, withthe door lock further including: a base fixed in the chamber, with thebase including a track and a groove in communication with the track,with the locking block slideably received in the track of the base andincluding a receiving groove, with the locking block limited by thetrack and movable in the transverse direction between the front positionadjacent to the unlatching mechanism and the rear position distant tothe unlatching mechanism; a shaft mounted in the receiving groove of thelocking block; a first sliding block slideably mounted on the shaft,with the first sliding block limited by the shaft and movable in thetransverse direction between a central position in a central portion ofthe receiving groove and a non-central position not in the centralportion of the receiving groove; a first compression spring mountedaround the shaft; a second compression spring mounted around the shaft,with the first sliding block located between the first and secondcompression springs, with the first and second compression springsbiasing the first sliding block to the central position; an electricdriving device mounted in the groove of the base and electricallyconnected to the power supply unit, with the electric driving deviceincluding a driving shaft having a threaded section at an intermediateportion thereof, with the driving shaft controlled to rotate in aforward direction or a reverse direction opposite to the forwarddirection; a second sliding block including a screw hole in threadingconnection with the threaded section of the driving shaft; a followerplate including a first portion coupled to the first sliding block and asecond portion coupled to the second sliding block, wherein when thedriving shaft rotates in the forward direction, the second slidingblock, the follower plate, and the first sliding block move towards theunlatching mechanism, wherein when the driving shaft rotates in thereverse direction, the second sliding block, the follower plate, and thefirst sliding block move away from the unlatching mechanism, whereinwhen the unlatching mechanism is in the release position, rotation ofthe driving shaft in the forward direction causes movement of thelocking block from the rear position towards the front position, whereinwhen the unlatching mechanism is in the pressing position, the lockingblock is blocked by the unlatching mechanism, rotation of the drivingshaft in the forward position causes the first sliding block to movefrom the central position to the non-central position and to compressthe first compression spring, permitting the locking block to beretained in the rear position, wherein when the locking block is in therear position, the locking block disengages from the unlatchingmechanism, permitting the unlatching mechanism to move from the releaseposition to the pressing position, wherein when the locking block is inthe front position, the locking block engages with the unlatchingmechanism, not permitting the unlatching mechanism to move from therelease position to the pressing position, and wherein when the lockingblock is in the front position, rotation of the driving shaft in thereverse direction causes movement of the locking block from the frontposition to the rear position.
 10. The door access control system asclaimed in claim 9, with the door lock further including: a thirdcompression spring mounted around the driving shaft; and a fourthcompression spring mounted around the driving shaft, with the secondsliding block located between the third and fourth compression springs,wherein when the locking block moves from the rear position towards thefront position, the second sliding block compresses the thirdcompression spring, wherein when the locking block moves from the frontposition to the rear position, the second sliding block compresses thefourth compression spring, wherein when the locking block is in thefront position, if the driving shaft keeps rotating in the forwarddirection, the second sliding block keeps compressing the thirdcompression spring, the screw hole of the second sliding blockdisengages from the threaded section of the driving shaft, and the thirdcompression spring biases the screw hole of the second sliding block toabut an end of the threaded section of the driving shaft, and whereinwhen the locking block is in the rear position, if the driving shaftkeeps rotating in the reverse direction, the second sliding block keepscompressing the fourth compression spring, the screw hole of the secondsliding block disengages from the threaded section of the driving shaft,and the fourth compression spring biases the screw hole of the secondsliding block to abut another end of the threaded section of the drivingshaft.
 11. The door access control system as claimed in claim 10, withthe threaded section of the driving shaft having a length in thetransverse direction slightly larger than a spacing between the rearposition and the front position of the locking block in the transversedirection.
 12. The door access control system as claimed in claim 9,with the base further including a positioning groove located between thetrack and the groove and intercommunicated with the groove, with thedriving shaft further including an end distant to the threaded sectionof the driving shaft, with the door lock further including: a pivotalblock detachably received in the positioning groove of the base, withthe pivotal block including a pivotal hole, and with the end of thedriving shaft pivotably received in the pivotal hole of the pivotalblock.
 13. The door access control system as claimed in claim 12, withthe base further including a first sliding groove extending from thesecond side towards the first side and intercommunicating with thegroove, with the cover plate further including a second sliding groovealigned with the first sliding groove, with the second sliding blockincluding a first lug and a second lug, with the first lug slideablyreceived in the first sliding groove of the base, and with the secondlug slideably received in the second sliding groove of the cover plate.14. The door access control system as claimed in claim 8, with thelocking block including a wider portion and a narrower portion, with thewider portion including two outer surfaces spaced from each other in awidth direction perpendicular to the transverse direction and an endface extending between the two outer surfaces, with the narrower portionincluding two inner faces between the two outer surfaces in the widthdirection, with the locking groove formed in the end face of the widerportion, with the locking block further including a through-holeextending from one of the two inner faces through another of the twoinner faces, with the wider portion of the locking block located outsideof the track of the base, with the narrower portion located in thetrack, with the base further including first and second sides spacedfrom each other in the width direction, with the unlatching mechanismfurther including a first driven ring, a second driven ring, and a firstfollower ring between the first and second driven rings, with the firstand second driven rings coupled to and jointly pivotable with the firstfollower ring, with the first driven ring including a first protrusionon an outer periphery thereof, with the second driven ring including afirst projection on an outer periphery thereof, with the followerportion formed on the outer periphery of the first follower ring, withthe case further including a side having a first pivotal hole pivotablyreceiving the first driven ring, with the case further including a firstscrew hole aligned with the wider portion of the locking block, with thedoor lock further including: a lid mounted to the case to close thechamber, with the lid including a second pivotal hole pivotablyreceiving the second driven ring, with the lid further including asecond screw hole aligned with the wider portion of the locking block; acover plate mounted to the first side of the base, with a spacingbetween the two inner faces of the locking block smaller than a bottomof the track and an inner face of the cover plate; a guiding blockslideably received in the through-hole of the locking block, with theguiding block including two ends respectively abutting the bottom of thetrack and the inner face of the cover plate, permitting the lockingblock to move in an axial direction of the guiding block parallel to thewidth direction between a first position adjacent to the side of thecase and a second position adjacent to the lid, with the guiding blockand the locking block jointly movable between the front position and therear position; a switching screw selectively engaged with the firstscrew hole of the case or the second screw hole of the lid, wherein whenthe switching screw engages with the first screw hole of the case, theswitching screw biases the locking block to the second position, thelocking groove of the locking block is aligned with the first projectionof the second driven ring in the axial direction of the guiding block,and the locking groove of the locking block is spaced from the firstprotrusion of the first driven ring in the axial direction of theguiding block, wherein when the switching screw engages with the secondscrew hole of the lid, the switching screw biases the locking block tothe first position, the locking groove of the locking block is alignedwith the first protrusion of the first driven ring in the axialdirection of the guiding block, and the locking groove of the lockingblock is spaced from the first projection of the second driven ring inthe axial direction of the guiding block, wherein when the locking blockis in the first position and moves from the rear position to the frontposition, the locking groove of the locking block engages with the firstprojection of the second driven ring, and wherein when the locking blockis in the second position and moves from the rear position to the frontposition, the locking groove of the locking block engages with the firstprojection of the first driven ring.
 15. The door access control systemas claimed in claim 8, with the door lock further including: a firstoperating device including a first handle operably connected to thelatching mechanism, with the first operating device adapted to bemounted to a first side of the door; a second operating device includinga second handle operably connected to the latching mechanism, with thesecond operating device adapted to be mounted to a second side of thedoor opposite to the first side of the door, wherein when the lockingmechanism is set to be in the unlocking state, rotation of either of thefirst and second handles moves the latch head from the latching positionto the unlatching position, and wherein when the locking mechanism isset to be in the locking state, rotation of either of the first andsecond handles is prevented, preventing movement of the latch head fromthe latching position to the unlatching position.